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Vol. 26 No. 3 (2014): Vol 26 Issue 3

Copyright (c) 2014 AJC

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Kinetics of Degradation of 4-Chlorophenol by Fenton Oxidation

https://doi.org/10.14233/ajchem.2014.15901
Shuangxi Nie
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Zhengmei Wu
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Shuangquan Yao
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Xinliang Liu
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Hainong Song
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Zhen Fang
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Xinyu Wang
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China
Shuangfei Wang
College of Light Industry and Food Engineering, Guangxi University, Guangxi, P.R. China

Corresponding Author(s) : Shuangfei Wang

wangsf@gxu.edu.cn

Asian Journal of Chemistry, Vol. 26 No. 3 (2014): Vol 26 Issue 3

Abstract

In this paper, the degradation of 4-chlorophenol contaminated water by Fenton process was investigated. It was found that 4-chlorophenol could be removed efficiently by Fenton process, and rapidly be degraded into low molecular weight organics under an optimum concentration of hydrogen peroxide to ferrous sulfate ([H2O2]/[FeSO4]) molar ratio of 20:1.Based on the reaction characteristics of the contaminant oxidized by Fenton, degradation kinetics model of 4-chlorophenol was constructed, kinetics equation of 4-chlorophenol degradation was eventually obtained through experiments, which could be expressed as: dW/dt = kC0.282H2O2W–0.273, where: dW/dt is the reaction rate, k is the rate constant, CH2O2 is the concentration of H2O2, W is the concentration decrease of 4-chlorophenol. The results showed that the reaction rate could be significantly increased when the concentration of H2O2 increased, and temperature increased in favor of the degradation of 4-chlorophenol. The reaction mechanisms of degradation of 4-chlorophenol were analyzed based on the kinetics equation, and the entire degradation process could be divided into two stages of rapid reaction and slow reaction.

Keywords

  4-Chlorophenol Fenton Kinetics model Reaction mechanism
(1)
Nie, S.; Wu, Z.; Yao, S.; Liu, X.; Song, H.; Fang, Z.; Wang, X.; Wang, S. Kinetics of Degradation of 4-Chlorophenol by Fenton Oxidation. ajc 2014, 26, 860-864.
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